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Following the effect of braid architecture on performance and damage of carbon fibre/epoxy composite tubes during torsional straining
DOI:
10.1016/j.compscitech.2020.108451
Authors:
Yuan
Chai
(The University of Manchester)
,
Ying
Wang
(The University of Manchester)
,
Zeshan
Yousaf
(The University of Manchester)
,
Malte
Storm
(Diamond Light Source)
,
Nghia T.
Vo
(Diamond Light Source)
,
Kaz
Wanelik
(Diamond Light Source)
,
Timothy L.
Burnett
(The University of Manchester)
,
Prasad
Potluri
(The University of Manchester)
,
Philip J.
Withers
(The University of Manchester)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Composites Science And Technology
State:
Published (Approved)
Published:
September 2020
Diamond Proposal Number(s):
13704
,
18197

Abstract: The torsional performance of bi-axially braided carbon fibre reinforced polymer (CFRP) tubes as a function of braid architecture is investigated. It is found that for a given braid pattern, the 45° braided CFRP tubes have higher shear moduli and lower shear strength than the 35° braids. In general, 2/2 (regular) braided CFRP tubes exhibit both higher shear strength and higher shear modulus than 1/1 (diamond) braids. However, beyond the peak load, the shear strength of 2/2 braided CFRPs exhibits sudden, steep drops, resulting in a lower remnant shear strength than 1/1 structures after the shear strain exceeds 4.5%. Moreover, the damage evolution is monitored in-situ by synchrotron X-ray computed tomography during torsional straining. It showed that for a 2/2 structure, inter-tow debonded regions are vertically interconnected allowing rapid crack propagation and strength drops, whereas for the 1/1 braid they are distributed in a chequer board causing more gradual loss of strength. The fibre/matrix interfacial strength and tow cross-over density play key roles in the torsional failure of 1/1 and 2/2 braided CFRP tubes, as the former controls damage initiation and the latter controls damage propagation.
Journal Keywords: Textile composites; Debonding; Damage mechanics; X-ray computed tomography; Braiding
Subject Areas:
Materials,
Engineering
Instruments:
I13-2-Diamond Manchester Imaging
Documents:
1-s2.0-S0266353820322417-main.pdf